bond s rod mill for work index
Bond Rod Index Mill 12” x 24” consisting of a one 1 piece cast shell complete with integral wave 1 Hp 360220 volt motorgear reducer drive support frame which allows the mill to tilt 5 degrees during operation and 45 degrees for discharge manual operation receiving pan rod charge and control panel complete with digital revolution counter startstop buttons and emergency stop button
Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills Various correction factors may have to be applied The test is a closedcircuit dry grindability test performed in a standard rod mill
More DetailBond Rod Mill Index Test Measuring ore grindability in rod mills The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions It is a locked cycle test conducted in closed
More DetailRod mill work index is used in the BondBarratt specific energy consumption model The work index is used to calculate the energy requirement to grind rocks in the medium size range from 10 mm 20 mm down to about 2 mm
More DetailBond Ball Mill Grindability Test The Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a predefined media and ore charge The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm
More DetailOct 03 2015 · The Titan Bond Work Index Rod Mill is onepiece cast construction with integral wave liners of a form described by Bond This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for
More DetailCalculate a Mill’s Operating Work Index Grate Discharge mills will not face this issue C This value represents the Volumetric Fractional Filling of the Voids in between the balls by the retained slurry in the mill charge As defined this value should never exceed 100 but in some cases – particularly in Grate Discharge Mills – it could be lower
More DetailThe Bond rodmill work index is used in conjunction with Bond’s third theory of comminution to merely calculate net energy requirements for sizing rodmills This test was originally developed in the mid 1930s by FC Bond
More DetailRod Mill Work Index Table Previous Next Here is a list presented in table form of Rod Mill Work Index as testedpresented by SME handbook of mineral processing NL Weiss Editor NY 1985
More DetailCleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done The sample was crushed to 100 passing 6 mesh 335mm from this a 700 cc volume was measured and weighed to be used as feed for the Bond Mill A feed particle size analysis was performed to determine feed P80 and
More DetailThe Bond Index conforming rod charge consists of 6 rods of 125“ diameter and 21“ length 2 rods of 175“ diameter and 21“ length The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a waveshaped design At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill
More DetailCommentary on the apparatus of the Bond rod mill Work Index by Alex Doll December 2015 The Bond “Third Theory” of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond and his collaborators were gathering the information to calibrate comminution models
More DetailRelation of Bond rod mill work index and crushing work index Similar to the ball mill work index the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms Unlike the ball mill work index the size of the feed to a rod mill test 10 mm–12 mm is closer to the size of the crushing test
More DetailRod Mill Power Draft The Marcy expression is applicable for mill diameters between 152 to 41meters Using peripheral speed the rotational speed can be determined Bond quantified the rod mill power draw as a function of the Work Index capacity and a series of correction factors
More DetailThis test determines the Bond Rod Mill Work Index which can be used with Bond’s Third Theory of Comminution to calculate net power requirements of sizing rod mills The test is a closedcircuit dry grindability test is run in a standard rod mill and can be performed at sizes ranging from 476 mm to
More DetailThe standard Bond Rod Mill Work Index test procedure is firstly to stage crush the feed to pass 127 mm and size a representative sample The test then involves a series of batch grinds in a standard Bond rod mill A Bond rod mill is 0305m by 0610m with wave liners of a form described by Bond which runs at 40rpm and tilts as described below
More DetailWork Index values crushing rod mill and ball mill analysed for correlations between UCS and various Wi values grindability well in advance of when ore are actually mined BM for small particles 3 mm Ammtec 2000 of rock that is representative of future mill feed
More Detail• Bond Test WI’s kWht Crushing160 Rod Mill 145 Ball Mill 138 • Bond Standard Circuit Work Index W1 160 x 10 SQRT 16000 – 10 SQRT 165000 09 kWht
More DetailRod Mill Batch Process The mill dimensions D × L are 0204 × 03 m and it is loaded with 855 kg steel rods 14 to 20 mm diameter The mill rotates on rolls and its frequency is set to 70 RPM corresponding to 85 of the critical frequency The mill power is 225 Watts calculated by 6 Fi P
More DetailThis mill has been operating inefﬁ ciently due to the hard coarse feed The rod mill work index has not been de ned as yet The ball ﬁ mill work index is con rmed at 16 kWht The operating ﬁ work index though is in the range of 21 kWht to 25 kWht showing high inefﬁ ciency
More DetailThe ore fed to a rod mill has a Bond Work Index of 175 kWht1 The p80 of feed to the mill is 425 cm and the p80 of the product from the mill is 0185mm Calculate the work required to grind the ore to the product size as well as the reduction ratio
More DetailThe Bonds standard ball mill is used to determine the work index value of differ ent samples The Bond work index is defined as the kilowatthours per short ton required to break from infinite size to a product size of 80 passing 100 µm If the breakage characteristics of a material remain constant over all size ranges the calcul ated work index would be expected to remain constant since it indicates the
More DetailThe test work index of the feed to a rod mill was 101 kWht Eighty percent of the feed passed 2 mm and 80 of the product from the mill passed 40 μm The mill diameter was 39 m and the L D ratio was 14
More DetailW is the work index measured in a laboratory ball mill kilowatthours per metric or short ton P 80 is the mill circuit product size in micrometers F 80 is the mill circuit feed size in micrometers Rod mill A rotating drum causes friction and attrition between steel rods and ore particles
More DetailBond Work Index FormulaEquation Pdf an global operational index wiog is defined for a conventional grinding plant consisting of a rod mill followed by three inverse hydrocycloneball mill grinding circuits and its value More Bond Work Index Procedure and Method
More DetailGeostatistics The Bond ball mill work index test is thought to be additive because of its units of energy nevertheless experimental blending results show a nonadditive behavior The SPI R value is known not to be an additive parameter however errors introduced by
More DetailUpon obtaining a consistent IPP the undersize product of the final cycle is sized to obtain a work index Bond Ball Work Index BBWi The sample is staged crushed to 100 passing 335 mm
More Detailstandard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design SAGDesign Tests patented by Outokumpu See reference 8 below The comparison of these results gives context to how the various measurements relate to each
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